DE973780C - Electrical insulating body with high dielectric constant and low dielectric loss angle - Google Patents
Electrical insulating body with high dielectric constant and low dielectric loss angleInfo
- Publication number
- DE973780C DE973780C DEP3366D DEP0003366D DE973780C DE 973780 C DE973780 C DE 973780C DE P3366 D DEP3366 D DE P3366D DE P0003366 D DEP0003366 D DE P0003366D DE 973780 C DE973780 C DE 973780C
- Authority
- DE
- Germany
- Prior art keywords
- oxide
- dielectric constant
- insulating body
- loss angle
- insulating material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 13
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 10
- 239000011810 insulating material Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 5
- 229910000428 cobalt oxide Inorganic materials 0.000 claims description 3
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims description 3
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 3
- 239000000615 nonconductor Substances 0.000 claims description 3
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 3
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims description 2
- 239000012671 ceramic insulating material Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 7
- 239000000395 magnesium oxide Substances 0.000 description 6
- 235000012245 magnesium oxide Nutrition 0.000 description 6
- 239000005995 Aluminium silicate Substances 0.000 description 5
- 235000012211 aluminium silicate Nutrition 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 239000003989 dielectric material Substances 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910003439 heavy metal oxide Inorganic materials 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- -1 wulfenite Chemical class 0.000 description 2
- FRWYFWZENXDZMU-UHFFFAOYSA-N 2-iodoquinoline Chemical compound C1=CC=CC2=NC(I)=CC=C21 FRWYFWZENXDZMU-UHFFFAOYSA-N 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 241000978776 Senegalia senegal Species 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- LTPBRCUWZOMYOC-UHFFFAOYSA-N beryllium oxide Inorganic materials O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000416 bismuth oxide Inorganic materials 0.000 description 1
- 229910052599 brucite Inorganic materials 0.000 description 1
- CXKCTMHTOKXKQT-UHFFFAOYSA-N cadmium oxide Inorganic materials [Cd]=O CXKCTMHTOKXKQT-UHFFFAOYSA-N 0.000 description 1
- CFEAAQFZALKQPA-UHFFFAOYSA-N cadmium(2+);oxygen(2-) Chemical compound [O-2].[Cd+2] CFEAAQFZALKQPA-UHFFFAOYSA-N 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 150000002611 lead compounds Chemical class 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
- C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
- H01G4/1209—Ceramic dielectrics characterised by the ceramic dielectric material
- H01G4/1218—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Inorganic Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Insulating Materials (AREA)
Description
Elektrischer Isolierkörper mit hoher Dielektrizitätskonstante und niedrigem dielektrischen Verlustwinkel In den letzten Jahren sind titanoxydhaltige elektrische Isolierkörper und keramische Kondensatoren mit hoher Dielektrizitätskonstante und niedrigem Verlustwinkel von verschiedener Zusammensetzung bekanntgeworden.Electrical insulator with high dielectric constant and low dielectric loss angle In recent years, titanium oxide-containing electrical insulators and ceramic capacitors with a high dielectric constant and low loss angle of various compositions.
Eine Gruppe dieser Isolierstoffe, die eine Dielektrizitätskonstante von etwa q.o bis 9o aufweisen, besteht aus 7o bis roo °/o Titanoxyd mit mehr oder weniger großen Zuschlägen an Plastifizierungsmitteln, wie Kaolin, Speckstein und Zuschlagstoffen in Form von Erdalkalioxyden. Eine zweite Gruppe mit einer Dielektrizitätskonstante von 1a bis 18 enthält zu überwiegendem Anteil Magnesiumoxyd und einen Titanoxydgehalt bis zu etwa 40°/o.A group of these insulating materials that have a dielectric constant from about q.o to 90, consists of 7o to roo ° / o titanium oxide with more or less large aggregates of plasticizers such as kaolin, soapstone and Aggregates in the form of alkaline earth oxides. A second group with a dielectric constant from 1a to 18 contains mainly magnesium oxide and a titanium oxide content up to about 40%.
Beide Gruppen von Isolierstoffen zeigen in ihren Eigenschaften und in ihrer keramischen Herstellungsmöglichkeit gewisse Nachteile. Die erste Gruppe hat zwar bei hohen Frequenzen einen niedrigen dielektrischen Verlustwinkel, doch steigt dieser bei niedriger Frequenz ganz außerordentlich stark an. Die zweite Gruppe ist wegen ihres hohen Gehaltes an Magnesiumoxyd und der dadurch bewirkten hohen Schwindung außerordentlich schwer herzustellen, so daß nur Werkstücke kleinerer Abmessungen daraus angefertigt werden können.Both groups of insulating materials show in their properties and Certain disadvantages in their ceramic manufacturing possibility. The first group has a low dielectric loss angle at high frequencies, it does this increases extremely strongly at a low frequency. The second group is because of its high magnesium oxide content and the resulting high levels shrinkage extremely difficult to manufacture, so that only workpieces smaller dimensions can be made from it.
Es sind ferner als Kondensatordielektrika geeignete titanoxydhaltige keramische Isolierstoffe mit einer Dielektrizitätskonstante von etwa 7o bis ioo bekanntgeworden, denen zur Erleichterung der Dichtsinterung Berylliumoxyd, Zinkoxyd, Manganoxyd, Bleioxyd oder andere Bleiverbindungen, wie Wulfenit, oder solche Stoffgemische zugesetzt wurden, die für sich allein nicht als Flußmittel zu betrachten sind, die aber infolge von Eutektikumsbildung miteinander zu Flußmitteln werden, beispielsweise Kaolin und Magnesia, Kaolin und Speckstein, Kaolin und Brucit USW. There are also suitable titanium oxide-containing ceramic insulating materials with a dielectric constant of about 70 to 100 known as capacitor dielectrics, to which beryllium oxide, zinc oxide, manganese oxide, lead oxide or other lead compounds, such as wulfenite, or such substance mixtures were not added on their own to facilitate the dense sintering Fluxes are to be considered which, however, as a result of the formation of eutectics together become fluxes, for example kaolin and magnesia, kaolin and soapstone, kaolin and brucite, etc.
Auch sind keramische elektrische Isolierstoffe mit einer Dielektrizitätskonstante bis zu etwa ioo bekanntgeworden, die aus Mischkristallen von Zinnoxyd und Rutil bestehen.Ceramic electrical insulating materials with a dielectric constant are also used up to about 100 have become known that consist of mixed crystals of tin oxide and rutile exist.
Nach einem nicht zum Stande der Technik gehörigen Vorschlag wurden ferner bereits Isolierstoffe für Kondensatordielektrika entwickelt, die aus etwa 87 bis 88 % Titandioxyd, etwa io °/a Wismutoxyd oder Cadmiumoxyd als Sinterungsmittel und etwa 2 bis 3 % der bekannten Zuschlagstoffe bestehen und eine Dielektrizitätskonstante zwischen 95 und ioo aufweisen sollen.According to a proposal that does not belong to the state of the art, insulating materials for capacitor dielectrics have also already been developed, which consist of about 87 to 88% titanium dioxide, about 10% bismuth oxide or cadmium oxide as a sintering agent and about 2 to 3 % of the known additives and a dielectric constant between 95 and ioo should have.
Gegenüber diesen bekannten elektrischen Isolierkörpern bezieht sich die vorliegende Erfindung auf eine Gruppe titanoxydhaltiger Isolierkörper mit hoher Dielektrizitätskonstante und niedrijem Verlustwinkel. Diese Isolierkörper bestehen erfindungsgemäß im wesentlichen aus einem Gemisch von Titanoxyd mit Kobaltoxyd und/oder Nickeloxyd. Die bei diesen Isolierkörpern zu erzielenden Dielektrizitätskonstanten sind höher als die Dielektrizitätskonstante der bisher bekanntgewordenen Dielektrika. Außerdem ist der Verlustwinkel dieser Isolierkörper auch bei niedriger Frequenz sehr gering. Andererseits haben die genannten, als Zuschlagstoffe zum Titanoxyd benutzten Schwermetalloxyde die Wirkung, daß die Dielektrizitätskonstante nicht in dem Maße herabgesetzt wird wie bei ausschließlicher Verwendung von Magnesiumoxyd als Zuschlagstoff. Außerdem bewirken sie eine verringerte Schwindung und damit eine gesteigerte Herstellungsmöglichkeit.Relates to these known electrical insulating bodies the present invention to a group of titanium oxide-containing insulating bodies with high Dielectric constant and low loss angle. These insulators exist according to the invention essentially from a mixture of titanium oxide with cobalt oxide and / or Nickel oxide. The dielectric constant to be achieved with these insulating bodies are higher than the dielectric constant of the previously known dielectrics. In addition, the loss angle of these insulators is also at low frequency very low. On the other hand, have the mentioned, as additives to the titanium oxide heavy metal oxides used the effect that the dielectric constant does not is reduced to the same extent as with the exclusive use of magnesium oxide as an aggregate. In addition, they cause a reduced shrinkage and thus a increased manufacturing possibilities.
Der Mengenanteil der genannten Schwermetalloxyde wird zweckmäßig zwischen io und 5004 gehalten. In manchen Fällen ist es zweckmäßig, neben den genannten Zuschlagstoffen noch gewisse Mengen Erdalkali zuzufügen, beispielsweise zwischen 5 und 30' ; o.The proportion of the heavy metal oxides mentioned is expediently kept between 10 and 5004. In some cases it is useful to add certain amounts of alkaline earth in addition to the additives mentioned, for example between 5 and 30 ' ; O.
Ein besonderer Vorteil der neuen keramischen Isolierkörper ist der, daß sie besonders leicht unter den Bedingungen des normalen keramischen Brandes (Segerkegel 8 bis 15) dichtsintern. Sie unterscheiden sich hiermit wesentlich von solchen Mischungen, die etwa aus 5o0/, Magnesiumoxyd und 5o0/, Titanoxyd bestehen. Derartige Mischungen haben ein so großes Kristallisationsvermögen, daß im üblichen keramischen Brand ein grobkristallines Gefüge entsteht, das nicht dicht ist, wogegen ein feinkristallines dichtes Gefüge erstrebt werden muß. Es ist bei den erwähnten Gemischen von Titanoxyd und Magnesiumoxyd auch durch Regelung der Brennbedingungen nicht möglich, zu dichten Körpern zu gelangen, da diese Isolierstoffe noch porös sind, selbst wenn sie bereits an der Unterlage festzukleben beginnen.A particular advantage of the new ceramic insulating body is that that they are particularly easy under the conditions of normal ceramic firing (Seger cone 8 to 15) sealed internally. This differs significantly from such mixtures, which consist for example of 5o0 /, magnesium oxide and 5o0 /, titanium oxide. Such mixtures have so great a crystallizability that in the usual ceramic firing creates a coarsely crystalline structure that is not tight, whereas a finely crystalline dense structure must be sought. It is with the ones mentioned Mixtures of titanium oxide and magnesium oxide also by regulating the firing conditions not possible to get to tight bodies, as these insulating materials are still porous even if they are already starting to stick to the surface.
Die bei dem Isolierkörper gemäß der Erfindung verwendeten Zuschlagstoffe haben demgegenüber die Wirkung, daß sie den Kristallisationsvorgang in der Weise beeinflussen, daß ein feinverfilztes, dichtes Kristallgefüge entsteht.The additives used in the insulating body according to the invention on the other hand have the effect that they the crystallization process in the way influence that a finely matted, dense crystal structure is formed.
Selbstverständlich können die notwendigen Plastifizierungsmittel, wie Kaolin, Speckstein, Dextrin, Gummiarabikum usw., den Mischungen in den benötigten, verhältnismäßig geringen Mengenanteilen beigefügt werden.Of course, the necessary plasticizers, such as kaolin, soapstone, dextrin, gum arabic, etc., the mixtures in the required, relatively small proportions are added.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3366D DE973780C (en) | 1936-04-05 | 1936-04-05 | Electrical insulating body with high dielectric constant and low dielectric loss angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3366D DE973780C (en) | 1936-04-05 | 1936-04-05 | Electrical insulating body with high dielectric constant and low dielectric loss angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE973780C true DE973780C (en) | 1960-06-02 |
Family
ID=7358720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEP3366D Expired DE973780C (en) | 1936-04-05 | 1936-04-05 | Electrical insulating body with high dielectric constant and low dielectric loss angle |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE973780C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE977624C (en) * | 1936-09-29 | 1967-08-24 | Porzellanfabrik Kahla | Dense sintered electrical insulating body made of low-loss ceramic mass with a high dielectric constant |
| DE980100C (en) * | 1951-03-31 | 1970-11-19 | Nat Lead Co | Ceramic bodies with a high dielectric constant and process for the manufacture of these bodies |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190923351A (en) * | 1909-10-12 | 1910-08-25 | British Thomson Houston Co Ltd | Improvements in Refractory Insulating Materials. |
| GB139315A (en) * | 1919-03-13 | 1920-03-04 | Gen Electric | Improvements in and relating to porcelain |
| DE498149C (en) * | 1926-04-04 | 1930-05-19 | Felix Singer Dr | Process for the production of insulating bodies from stoneware |
| US1842433A (en) * | 1928-12-28 | 1932-01-26 | Ward Leonard Electric Co | Resistance device and insulator |
| FR738222A (en) * | 1932-06-06 | 1932-12-22 | Process for manufacturing ceramic compositions having a high density acquired during firing | |
| GB389790A (en) * | 1930-06-17 | 1933-03-23 | Vaw Ver Aluminium Werke Ag | A composition for electro-technical purposes |
| DE588271C (en) * | 1928-09-11 | 1933-11-18 | Ton & Steinzeug Werke Akt Ges | Process for the production of insulating bodies from stoneware |
| FR782028A (en) * | 1933-11-30 | 1935-05-27 | Porzellanfabrik Kahla | Insulating materials with high dielectric constants in particular for high frequency purposes |
| GB429730A (en) * | 1933-09-27 | 1935-06-05 | Steatit Magnesia Ag | Improvements relating to electrical insulators |
| FR787387A (en) * | 1934-03-17 | 1935-09-21 | Porzellanfabrik Kahla | Ceramic dielectric for capacitance independent of temperature |
| FR790509A (en) * | 1934-06-01 | 1935-11-22 | Steatit Magnesia Ag | Application of ceramic materials with additions of titanium dioxide to the establishment of electric circuits or capacitors independent of temperature |
| FR790839A (en) * | 1934-06-05 | 1935-11-28 | Steatit Magnesia Ag | Ceramic insulating material and its application to the manufacture of electron tube caps |
| GB445495A (en) * | 1933-11-30 | 1936-04-14 | Porzellanfabrik Kahla | Improvements in and relating to electric condensers |
| US2128289A (en) * | 1936-11-16 | 1938-08-30 | Dubilier William | Ceramic dielectric material and process of making the same |
| DE717682C (en) * | 1936-01-31 | 1942-02-19 | Carl Schusterius Dr | Electrical capacitor with a ceramic dielectric containing titanium dioxide |
| DE738104C (en) * | 1934-10-21 | 1943-08-03 | Franz Skaupy Dr | Dielectric for electrical capacitors |
-
1936
- 1936-04-05 DE DEP3366D patent/DE973780C/en not_active Expired
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190923351A (en) * | 1909-10-12 | 1910-08-25 | British Thomson Houston Co Ltd | Improvements in Refractory Insulating Materials. |
| GB139315A (en) * | 1919-03-13 | 1920-03-04 | Gen Electric | Improvements in and relating to porcelain |
| DE498149C (en) * | 1926-04-04 | 1930-05-19 | Felix Singer Dr | Process for the production of insulating bodies from stoneware |
| DE588271C (en) * | 1928-09-11 | 1933-11-18 | Ton & Steinzeug Werke Akt Ges | Process for the production of insulating bodies from stoneware |
| US1842433A (en) * | 1928-12-28 | 1932-01-26 | Ward Leonard Electric Co | Resistance device and insulator |
| GB389790A (en) * | 1930-06-17 | 1933-03-23 | Vaw Ver Aluminium Werke Ag | A composition for electro-technical purposes |
| FR738222A (en) * | 1932-06-06 | 1932-12-22 | Process for manufacturing ceramic compositions having a high density acquired during firing | |
| GB429730A (en) * | 1933-09-27 | 1935-06-05 | Steatit Magnesia Ag | Improvements relating to electrical insulators |
| FR782028A (en) * | 1933-11-30 | 1935-05-27 | Porzellanfabrik Kahla | Insulating materials with high dielectric constants in particular for high frequency purposes |
| GB445495A (en) * | 1933-11-30 | 1936-04-14 | Porzellanfabrik Kahla | Improvements in and relating to electric condensers |
| FR787387A (en) * | 1934-03-17 | 1935-09-21 | Porzellanfabrik Kahla | Ceramic dielectric for capacitance independent of temperature |
| FR790509A (en) * | 1934-06-01 | 1935-11-22 | Steatit Magnesia Ag | Application of ceramic materials with additions of titanium dioxide to the establishment of electric circuits or capacitors independent of temperature |
| FR790839A (en) * | 1934-06-05 | 1935-11-28 | Steatit Magnesia Ag | Ceramic insulating material and its application to the manufacture of electron tube caps |
| DE738104C (en) * | 1934-10-21 | 1943-08-03 | Franz Skaupy Dr | Dielectric for electrical capacitors |
| DE717682C (en) * | 1936-01-31 | 1942-02-19 | Carl Schusterius Dr | Electrical capacitor with a ceramic dielectric containing titanium dioxide |
| US2128289A (en) * | 1936-11-16 | 1938-08-30 | Dubilier William | Ceramic dielectric material and process of making the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE977624C (en) * | 1936-09-29 | 1967-08-24 | Porzellanfabrik Kahla | Dense sintered electrical insulating body made of low-loss ceramic mass with a high dielectric constant |
| DE980100C (en) * | 1951-03-31 | 1970-11-19 | Nat Lead Co | Ceramic bodies with a high dielectric constant and process for the manufacture of these bodies |
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